Method of cutting disks.



Dn RBNSN. METHOD OF CUTTING DISKS.

APPLICATION FILED JAN. 28, 1909.

v atented Mair. Q, 3.909.

. UNITED sTATEs'rATENT OEEIO DANIEL P. ROBINSON, orBLTII/IOREMARYLAND.'AssIGNoR To CONTINENTAL OAN OOM- PANY, or BALTIMORE,MARYLAND, A CORPORATION or NEW JERSEY.

METHOD or CUTTING mens'.

To all whom it may comme;

a `citizen oi' the UnitedV States, residing at Baltimore, in the`Stateof Maryland, have invented certain new and useful Improvements inMethods of CuttingDisks, .of whichthe following is a description,reference being had to the accompanying drawing, and to the letters andiig-ures of reference marked thereon.

My invention relates to new and useful improvements in the methods ofcutting disks from sheets of metal with a gang of dies, and has for anObject to cut in successive operations a maximum number of disks from asheet by th esamt arrangement of dies.

I have shown and described in my copending application, Serial No.422,225, led

March th, 1908, an vlap aratus including an rarrangement of diesan gageins, wherein my improved method hereina ter described may be carriedout.l

In the drawingswhich show by way of illustration an application of mymethod, the arrangement of disks andthe arrangement of the'sheet and thedisks in the diderent sheet of metal from which, by a suitable ga'ng ofdies, disks have been cut, in'accord-l ance with one step of my method;Fig. 2 is a similar view, showing the sheet shifted latere ally, and aseries of disks cut therefrom by another step of my method; Fig'. 3 is aview 'similar to Fig. 1, showing the sheet changed end'tfor end, andpositioned so that a series of disks may be cut therefrom by anotherstep in my method; Fig. 4 is a view similar to Fig. 3, showing the sheetshifted laterally, and a series of disks cut therefrolnby another stepin my method. y

In carrying out my method, a sheet of metal 1 is presented to a gang ofdies, which, as herein illustrated, are twelve in number,

and so disposed relative to one another, that a series of disks@ are cutfrom said sheet of metal. are arran ed in three parallel rows indicatedby dotte lines 2 2, 3 3 and 4 4.` The disks are disposed in each row, sothat the distance between' said disks indicatedby the letter a; isslightly greater than the diameter of one of the dies', so that inanother o eration, either subsequent or'prior to the a ove operation, adisk may be cut from the sheet of metal by oneof said gang of dies,which Specification of Letters Patent. Appiicationmed January'zs, 1909'.seria; N. 474,766.

The twelve disks, as'shown in Fig. 1,

I bis-.located between the adj acentidisks in Beit known that I, DANIELI. ROBINSON, i

hold together at this point The end disk 6 i in each row lis spaced fromthe other edge of the sheet a distance slightly greater than PatentedMarch 9,

half thediameter of one of the dies-for the purposel hereinafterdescribed.

The rows 2 2, 3 3, and 4 4-, are spaced a distance from one anotherslightly less than I the diameter .of the dies, so that in anotheroperation, either subsequent or prior to the above operation, a row ofdisks may be cut from the sheet of metal, by the same gang of dies,which row is disposed between the ladjacent rows above described,provided that the disks in said row are staggered relavtive to the disksin the iirst named rows.

The row ofv disks 4 4 is also preferably arranged a distance from theedge of thesheet, so as to allow another row of disks to be cut fromsaid sheet by the same gang of dies steps of the method,' -Figure 1represents a l between the row 4 4 and the edge of the sheet, providedthe disks are staggered relative to the disks in the .row 4 4.

In another operation, the sheet of metal J .the rows 2 2, 3 3 and 4 4,and are located between the disks in said rows.

In another operation, the sheet of metal is changed end for end, andpresented to said gang of dies, so that a series ofdisks c are cuttherefrom. Said disks c are arranged vin three parallel rows 7 7, 8 8and 9 9.

The row 7 7 is located between the rows 2 2 and 3 3 of the irst namedseries of disks, while the row 8 8 is between the rows 3 3 and 4 4, andthe row 9 9 is between the row 4 4 and the edge of the sheet; The enddisks 10 in each of the rows of said series of disks are preferablylocated adjacent the edge of the sheet 11, which is the opposite end ofthe sheet ladjacent which the disks '5 are located. .The end disks 6 ofthe iirst series of disks are spaced a suiicient distance from the edge11 of the sheet, so as to provide sufficient metal for cutting the end vwhereby in a subsequent or in a prior opera'- located in the ro'ws 7-7,8 8 and 99, and between the disks 6.',

disk 10. The disks' c in each row are staggeredJelative to the disksinthe adjacent rows. The disks c in each row 4are also located adistance, indicated by y in the drawing, from one another, which isslightly greater than the diameter of the dies,

tion, a diskmay be out from the sheet of metal between the said adjacentdisks c.

In another operation, the sheet of metaly is shifted laterally, and aseriesof disks d, as herein illustrated, nine in number, are cut by saidgang of dies. The disks d are It is well understood that in cuttingdisks from a sheet of metal, it is im racticable to cut two disks fromthe meta at the same time, which shall be very close to each other, forthe reason that the female dies which cooperate with the male dies mustbe necessarily s aced a sufficient distance, in order :alo provi esufficient metal Ito form a female By my improved method, the diskswhich are cut in any one operation, are spaced a sufficient distance, s0that in another o era tion --a disk may be'cut from the meta between thefirst mentioned disks, and, therefore, in the separate operations, I amenabled to c'ut disks from a sheet of metal which are spaced only asufficient distance to allow the metal to hang together and therebyreduce toa minimum the waste material in each sheet which is being cut.

It will further be noted that by my imroved method, each operation maybe er-v ormed by the same gang of dies, the s eet merely being shiftedlaterally relative to the '1n a dierent order from that gang of dies,and changed end for end, and properlyfpositioned so as to cut thediierent arrangements of disks above described. ll

It will be obvious that the various steps of my method may, if desired,be erformedy erein described. That is to say, the second series of disksmay be cut prior to the rst series of disks, or any order of cutting maybefollowed. A

I haveherein referred to the preferred order of cutting the disks,solelyas a means of describing the location of oneseries of disks relative toanother, and the location of the sheet relative to the gan of dies.

Having thus articularly escribed my invention, what I claim as new anddesire tosecure by Letters Patent, is

The method of cutting disks from a sheet ofmetal, consisting in cuttingin one-operation by a gan of dies, a series of disks arranged in paralel rows with the space between adjacent disks slightly greater than thediameter of thedies and the space between the rows of disks slightlyless than the diameter of the dies, shifting the sheet laterally andcutting in another o eration by said gang of dies, a series of disksocated between the disks and in the rows of the first named for end, andcutting in another operation by said gang of dies, a series of disksllocated in'parallel rows between therows of the first named series andstaggered relative to the disks in said rows, and shifting thesheetlaterally and cutting in another operation by said gang of dies aseries of disks located between the disks and in the rows of the lastnamed series.

In testimony whereof I affix my signature, in presence of two witnesses.

Witnesses:

LoUrs C. KLERLEIN, ARTHUR W. NORTON.

DANIEL P. ROBINSON.

= series, changing the position of the sheet end

